Serial port cable
#13
(03-13-2020, 12:37 PM)zaius Wrote:
(03-11-2020, 02:41 PM)danielt Wrote: 3.3v adapters could cause touble (IIRC 3.3v is, strictly speaking, slightly over-volted too... but hopefully it is within engineering tolerances). However if they do cause trouble why are we not getting failure reports for that?

Maybe they using a different chipset? Huh

"When serial interface output is free, the TXD in CH340H and CH340T is high level, TXD in CH340R is low-level."

https://cdn.sparkfun.com/datasheets/Dev/...340DS1.PDF

CH340R is a special case part designed to reduce part counts by eliminating the need for any external inverting buffer when interfacing with a system that does not idle at logic 1 (IrDA for example). Connecting this part to a device that does idle at logic 1 would make no sense and and when is doesn't work it would certainly not be due to any fault in the PBP.
PineTime: wasp-os and MicroPython, Pinebook Pro:  Debian Bullseye
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Messages In This Thread
Serial port cable - by bsammon - 03-06-2020, 04:11 PM
RE: Serial port cable - by tllim - 03-09-2020, 06:00 PM
RE: Serial port cable - by z4v4l - 03-09-2020, 07:06 PM
RE: Serial port cable - by danielt - 03-10-2020, 02:16 AM
RE: Serial port cable - by zaius - 03-10-2020, 11:56 AM
RE: Serial port cable - by danielt - 03-11-2020, 08:53 AM
RE: Serial port cable - by zaius - 03-11-2020, 01:00 PM
RE: Serial port cable - by danielt - 03-11-2020, 02:41 PM
RE: Serial port cable - by zaius - 03-13-2020, 12:37 PM
RE: Serial port cable - by danielt - 03-16-2020, 08:18 AM
RE: Serial port cable - by zaius - 03-16-2020, 12:44 PM
RE: Serial port cable - by vrabac - 03-10-2020, 12:25 AM
RE: Serial port cable - by z4v4l - 03-11-2020, 03:37 PM
RE: Serial port cable - by danielt - 03-12-2020, 04:48 AM
RE: Serial port cable - by xyzzy - 11-18-2020, 09:59 PM
RE: Serial port cable - by mattpenn - 03-03-2021, 08:32 AM
RE: Serial port cable - by tllim - 03-04-2021, 12:49 AM
RE: Serial port cable - by mattpenn - 03-04-2021, 10:00 AM

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